Here is another directional antenna that helps improve your connection. The Proxicast 9/11 dBi High Gain 3G/LTE/WiFi Antenna works with GSM, LTE, and cellular services. It is compatible with 4.9GHz, 2.4GHz, and 900MHz system. It comes with an outdoor weatherproof enclosure.
This antenna ships with a pole and wall mounting bracket. It is compatible with USB cellular modems, hotspots, and various routers.